What is the power of a car traveling at 30. m/s with a force of 1000. N?

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To calculate the power exerted by a force of 1000 N on a car traveling at 30 m/s, the formula for power, which is the product of force and velocity, is used. Power is defined as the rate of doing work, expressed in watts (J/s). The calculation involves multiplying the force (1000 N) by the speed (30 m/s), resulting in a power output of 30,000 watts or 30 kW. The discussion confirms that both force and speed are in the same direction and treats all values as positive. Understanding these concepts is essential for solving similar physics problems.
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Homework Statement


What is the power being exerted by a force of 1000. N on a car traveling at 30. m/s? (Assume that force and speed are in the same direction, and treat all numbers as positive.)

Homework Equations


Power = J/s
Work =F*d
 
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I got it. Since a Joule is a N*m, and Power is a N*m/s; I just multiple the 1000N by 3m/s to get the power. Thanks brain!
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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